Without a doubt, this seems to be a common issue. Ive been stuck in account merge “queue” for multiple months trying to connect my xbox account to my blizzard/steam account. Ive tried logging in and out to no avail, as well as checking on both devices to ensure I was in the “queue”. I never intended originally to buy anything so it was never an issue, but with the somewhat recent addition to gamepass and its free mythic essence, being in merge queue means that I cannot even peer through the store at anything.